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20 results for “Sparse retrieval”

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cs.IRcs.AIcs.LGRecentMay 28, 2026

No More K-means: Single-Stage Sparse Coding for Efficient Multi-Vector Retrieval

Lixuan Guo, Yifei Wang, Tiansheng Wen, Aosong Feng +2 more

The paper introduces Single-stage Sparse Retrieval (SSR), a method that replaces computationally expensive vector clustering with sparse autoencoding to achieve highly efficient multi-vector retrieval…

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cs.IRcs.AIcs.CLRecentMay 28, 2026

Latent Terms: Dense Retrievers Contain Trivially Extractable BM25-ready Zipfian Vocabularies

Benjamin Clavié, Sean Lee, Aamir Shakir, Makoto P. Kato

The paper introduces Latent Terms, a method that shows dense retrieval models implicitly learn sparse, Zipfian vocabularies that can be used for classical BM25-style sparse scoring without requiring s…

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cs.CLcs.IREmpiricalRecentJun 10, 2026

uva-irlab-conv at SemEval-2026 Task 8: Multi-Turn RAG with Learned Sparse Retrieval and Listwise Reranking

Simon Lupart, Kidist Amde Mekonnen, Zahra Abbasiantaeb, Mohammad Aliannejadi

This paper proposes a multi-turn retrieval-augmented generation pipeline for conversational systems across four domains.

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cs.IRcs.LGstat.MLRecentJun 3, 2026

Distributional Approximate Nearest Neighbour Search for Uncertainty-Aware Retrieval

Olivier Jeunen

The paper proposes DINOSAUR, a framework that incorporates embedding uncertainty into Approximate Nearest Neighbour search to improve retrieval for niche, long-tail content.

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cs.LGcs.AIRecentMay 31, 2026

When Data Is Scarce: Scaling Sparse Language Models with Repeated Training

Boqian Wu, Qiao Xiao, Patrik Okanovic, Tomasz Sternal +5 more

This paper introduces a new scaling law for sparse language models trained with limited data, demonstrating that sparsity can significantly improve performance and delay data saturation during multi-e…

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cs.CLcs.AIRecentMay 27, 2026

PrunePath: Towards Highly Structured Sparse Language Models

Zhexuan Gu, Zixun Fu, Yancheng Yuan

PrunePath introduces a budget-adaptive structured sparsification framework that efficiently prunes Feed-forward networks in large language models, achieving hardware-friendly sparsity and measurable s…

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q-bio.NCcs.LGRecentJun 1, 2026

How Optimality Structures Sparse Dictionaries: A Theory for Understanding SAE Representations

William Dorrell

The paper theoretically analyzes the properties that optimal sparse autoencoder (SAE) dictionaries must satisfy, deriving constraints that explain observed SAE behaviors like hierarchical splitting an…

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cs.IREmpiricalRecentJun 10, 2026

Tail-Aware Adaptive-k: Query-Adaptive Context Selection for Retrieval-Augmented Generation

Ziyu Song, Jiaming Fang, Kuangyu Li, Tuo Xia +1 more

This paper proposes Tail-Aware Adaptive-k (TAA-k), a training-free framework for adaptive context selection in retrieval-augmented generation systems using Extreme Value Theory.

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cs.CVcs.AIRecentMay 29, 2026

Beyond Classification: Dynamic Adapter Routing for Continual Multimodal Retrieval

Alicja Dobrzeniecka, Filip Szatkowski, Sebastian Cygert, Szymon Lukasik +1 more

The paper proposes Dynamic Adapter Routing (DAR), a novel method that significantly improves continual multimodal retrieval by adaptively selecting and merging specialized adapters.

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cs.LGcs.AIRecentMay 31, 2026

HASTE: Hardware-Aware Dynamic Sparse Training for Large Output Spaces

Nasib Ullah, Jinbin Zhang, Jean Lucien Randrianantenaina, Erik Schultheis +1 more

HASTE introduces group-shared fixed fan-in sparsity for multi-label classification, achieving significant wall-clock speedups (up to 25x in backward pass) by enabling efficient GPU execution while mai…

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cs.CLcs.AIcs.LGRecentJun 4, 2026

Self-Augmenting Retrieval for Diffusion Language Models

Paul Jünger, Justin Lovelace, Linxi Zhao, Dongyoung Go +1 more

The paper introduces SARDI, a novel, training-free framework that uses low-confidence 'lookahead' tokens generated during the denoising process of discrete diffusion language models to dynamically gui…

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cs.IRcs.AIRecentMay 29, 2026

SPECTRA: Synthetic IR Test Collections with Relevance Oracles and Controlled Distractor Diagnostics

Eric Liang

The paper introduces SPECTRA, a scalable framework for generating large, synthetic, and controllable information retrieval test collections, demonstrating its ability to expose system scaling and fail…

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cs.IRcs.AIcs.LGRecentMay 31, 2026

Test-Time Training for Zero-Resource Dense Retrieval Reranking

Shiyan Liu, Yichen Li

The paper proposes DART, a test-time adaptation method that enhances zero-resource dense retrieval reranking by adaptively tuning a bilinear scoring matrix using pseudo-positive and pseudo-negative ex…

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cs.LGcs.AIRecentMay 27, 2026

Locality-Aware Redundancy Pruning for LLM Depth Compression

Vincent-Daniel Yun, Youngrae Kim, Woosang Lim, YoungJin Heo +2 more

The paper proposes Locality-Aware Redundancy Pruning (LoRP), a training-free method that prunes LLM layers by exploiting localized inter-layer redundancy, leading to improved efficiency while maintain…

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cs.AIcs.IRcs.LGRecentMay 28, 2026

CoHyDE: Iterative Co-Training of LLM Rewriter & Dense Encoder for Tool Retrieval

Vaishali Senthil, Ashutosh Hathidara, Sebastian Schreiber

CoHyDE introduces an iterative co-training framework that jointly optimizes an LLM rewriter and a dense encoder, significantly improving tool retrieval accuracy for LLM agents, especially on vague que…

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cs.DScs.CCmath.CORecentMay 29, 2026

High-Dimensional Expanders, the Sparsest Cut Problem, and Steurer's Conjecture

Farzam Ebrahimnejad, Shayan Oveis Gharan

The paper refutes Steurer's conjecture regarding the existence of large constant-separated sets within families of unit-norm vectors with low average correlation, using high-dimensional expanders to s…

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cs.LGRecentJun 1, 2026

Regularized Large Neighborhood Search

Germain Vivier-Ardisson, Laurent Demonet, Axel Parmentier, Mathieu Blondel

The paper introduces Regularized Large Neighborhood Search (RLNS), a method that adapts the LNS heuristic into an efficient MCMC sampler for combinatorial optimization, allowing end-to-end learning wi…

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stat.MLcs.LGRecentJun 1, 2026

Doing well with less! On Sampling Techniques for Empirical Pairwise Loss Estimation/Minimization

Louise Davy, Stephan Clémençon, Charlotte Laclau

This paper introduces survey sampling techniques to estimate or minimize empirical pairwise loss functions, showing that targeting informative pairs significantly reduces computational cost while main…

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cs.LGcs.AIRecentMay 30, 2026

Memory-Efficient LLM Training with Dynamic Sparsity: From Stability to Practical Scaling

Qiao Xiao, Boqian Wu, Patrik Okanovic, Tomasz Sternal +5 more

The paper introduces Sparse Memory-Efficient Training (SMET), a method that stabilizes and optimizes Dynamic Sparse Training (DST) for large language models, enabling stable and memory-efficient spars…

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